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<p class="Decl"><b>procedure</b> PrepareSampling; <b>override</b>;</p>
<h2>Description</h2>
<p class="Body">The <span class="EmptyRef">PrepareSampling</span> method should be called before calling GetSample, as internal variables are precalculated prior to any per-pixel-processing here. See <a href="../../../../GR32/Classes/TCustomSampler/Methods/PrepareSampling.htm">TCustomSampler.PrepareSampling</a> for further details how and when this method is called.</p>
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